Structural Organisation in Animals
CBSE · Class 11 · Biology
Most important questions from Structural Organisation in Animals for CBSE Class 11 Biology board exam 2026. MCQs, short answer, and long answer questions with marks.
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Sample Questions
What is the primary function of the cloaca in frogs?
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To pass faecal matter, urine, and sperms to the exterior
The cloaca is described as a small, median chamber used to pass faecal matter, urine and sperms to the exterior. In male frogs, it receives the urinogenital duct, so it serves as a common outlet for excretory and reproductive wastes. It is not a digestive organ or a blood vessel.
How many chambers does a frog's heart have?
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3
A frog's heart has three chambers: two atria and one ventricle.
What is the scientific name of the common Indian bullfrog?
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Rana tigrina
Rana tigrina is the scientific name for the most common species of frog found in India.
How many ova can a mature female frog lay at a time?
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2500-3000
A mature female frog can lay between 2,500 to 3,000 ova at a time.
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
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